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Journal : HAYATI Journal of Biosciences

Preliminary Characterization of Protease Inhibitor from Bacteria-Associated with Sponge from Panggang Island, Seribu Islands TATI NURHAYATI; MAGGY THENAWIDJAJA SUHARTONO; LILIS NURAIDA; SRI BUDIARTI POERWANTO
HAYATI Journal of Biosciences Vol. 13 No. 2 (2006): June 2006
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (157.733 KB) | DOI: 10.4308/hjb.13.2.58

Abstract

Pathogenic bacteria produced protease that involved in molecular mechanism of foodborne disease. Produced protease involved in molecular mechanisms of foodborne diseases. The purpose of this research was to screen, identify and characterize the potential microorganisms associated with sponge as producer of protease inhibitor. Among 96 isolates examined, four isolates i.e 10A6, 6A3, 9A51, and 1A12 yielded protease inhibitors which were potential to inhibit protease substrates (40-90%). One of the most potential protease inhibitor producer, the bacteria isolate 6A3, was identified as Chromohalobacter sp. Chromohalobacter sp.6A3 produced protease inhibitor with optimum temperature and pH 300 C and 5, respectively. The inhibitor activity was stable when incubated at 400 C for ten minutes or at 300 C for 8 hours. Key words: Bacteria, Chromohalobacter sp., protease inhibitor, screen, sponge
Population Dynamics of Yeasts and Lactic Acid Bacteria (LAB) During Tempeh Production . EFRIWATI; ANTONIUS SUWANTO; GAYUH RAHAYU; LILIS NURAIDA
HAYATI Journal of Biosciences Vol. 20 No. 2 (2013): June 2013
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (139.422 KB) | DOI: 10.4308/hjb.20.2.57

Abstract

Yeasts and lactic acid bacteria (LAB) are commonly found in tempeh and has been studied separately. However, comprehensive study on population dynamics of yeasts and LAB during tempeh production, including the effect of the difference tempeh production methods has not been reported. This research was aimed in studying the effect of different methods of tempeh production applied in tempeh home industry on the dynamics of yeast and LAB communities. Population dynamics was expressed as both changes of colony number and its phylotype. Samples were obtained from five stages and from two different methods of tempeh production. Observations were carried out employing colony counting on selective media followed by Terminal Restriction Fragment Length Polymorphism (T-RFLP). The study indicated that the population of yeasts and LAB during tempeh production were dynamic and different between these methods. Tempeh production methods affected the presence of yeasts and LAB population as indicated by difference in colony number, the number and diversity of phylotype, as well as number of specific phylotypes grew on plates.
Co-Authors . EFRIWATI . Hana Afifah Zahra Agista Alam, Syah Khalif Amor Tresna Karyawati, Amor Tresna Anja Meryandini Antonius Suwanto Antung Sima Firlieyanti Antung Sima Firlieyanti Apriliana W. Hartanti Ardiansyah . Arimah Arimah Bambang Pontjo Priosoeryanto Betty Jenie Sri Laksmi Betty Sri Laksmi Betty Sri Laksmi Jenie Betty Sri Laksmi Jenie Budi Nurtama Cece Sumantri Cynthia Rizka Riani Dahrul Syah Dede R. Adawiyah Dede Robiatul Adawiyah Denny Agustin Desty Gitapratiwi Desty Gitapratiwi Dewi, Fitriya Nur Annisa Dewi, Retno Anggrina Khalistha Dian Herawati Dias Erfan Dodik Briawan Donna Fujie Rahaditha Utami Dreitsohn Franklyn Purba Eko Hari Purnomo Emmawati, Aswita Endang Prangdimurti Epi Taufik Fadhina, Maisharah Fadlillah, Hendry Noer Faleh Setia Budi Farida, Eko Fenny Larasati Firat Meiyasa Gayuh Rahayu Hana - - Hana . Hana . Hanifah Nuryani Lioe Haqqifizta Ratihwulan Harsi D. Kusumaningrum Hendry Noer Fadlillah Iffa Illiyya Fatma Irma Isnafia Arief Jamal Zamrudi Madaniyah, Siti Maggy T. Suhartono Maggy Thenawidjaja Suhartono Mahara, Fenny Amilia Mochammad Sriduresta Soenarno NASRIANTI SYAM, NASRIANTI Ni Nyoman Puspawati Nur Rita Mardiana Nurbety Tarigan Nurdin, Qamariyah Nuri Andarwulan Nurwulan Purnasari Pika Mustika Purwiyatno Hariyadi Puspo Edi Giriwono Qamariyah Nurdin Raini Panjaitan Ratih Dewanti -Hariyadi Ria Noviar Triana Rina Ningtyas Safrida Safrida Siti - Winarti Siti Madanijah Siti Madaniyah Siti Nurjanah Slamet Budijanto Sri Budiarti Poerwanto Sri Rini Dwiari Suci Apsari Pebrianti Sutrisno Koswara TATI NURHAYATI Tio, Yohana Tania Tita Rialita Tjahja Muhandri Ummul Khayrah Uswatun Hasanah Utami, Donna Fujie Rahaditha Widya Aprilita Minamilail Winiati P Rahayu Winiati P Rahayu Winiati P. Rahayu Winiati P. Rahayu Winiati Pudji Rahayu Yati Maryati Yati Maryati Yeni Kurniati Yeni Kurniati Yeni Restiani Yuli Sukmawati YULIN LESTARI Zamrudi, Jamal Zulaikhah Zulaikhah Zulaikhah Zulaikhah Zulaikhah Zulaikhah, Zulaikhah